Some cyclists are surprised when they get a DUI from a police officer while cycling drunk. But there's excellent reason for that: Drunk cyclists have impaired reflexes, longer reaction times, and less awareness of the world around them. In other words, they can pretty easily get run over, especially late at night when drivers may not be able to see them. The Alcoho-Lock, though, makes this hard to do. If you don't think you need this feature, you should also look at our review of the N'Lock bike lock for a more traditional bike lock.\r\nCycling While Drunk\r\nAs you might guess, it's pretty simple: To unlock your bike, you need to flip up the lock and blow into it. If you're OK to cycle, the lock will click open and you can be on your merry way. If you're too drunk to get on a bike, determined by legal limits, the lock, and you, stays put. A battery charge lasts for about forty breath tests, so one assumes that will last for a while. At least we hope so. If this is a serious problem for you, you might want to cut back on the beer in the first place.\r\nLocked Out\r\n\r\n That said, there are a few drawbacks here. The first is that it's an aluminum lock, so it's not going to stand up to thieves very well. The second is that it's $250; hey, breathalyzers don't come cheap... but they do come cheaper. The final is, well, we're not totally sure what happens if the battery dies and the lock is still around your bike. Still, if you'd like to keep a friend safe while cycling, or just need to ensure you're safe on the road, this might be a good investment.